Finding the Fourth Proportional to 1,429.40, 1,972.62 and 799.92

Step by Step Solution

1. Step 1: Write the proportion equation
   1,429.40 : 1,972.62 = 799.92 : x
2. Step 2: Convert to fraction form
   1,429.40/1,972.62 = 799.92/x
3. Step 3: Cross multiply
   1,429.40x = 1,972.62 × 799.92
4. Step 4: Simplify right side
   1,429.40x = 1,577,938.19
5. Step 5: Solve for x
   x = 1,577,938.19/1,429.40
6. Step 6: Final answer
   x = 1,103.92